Oil Leaking From Front Turbo Housing

[Kaido_RR]

Hi,

I have a problem with my front turbo on my r32 gtr. Back story, purchase a set of HKS GT-SS from japan when they arrive the seals where gone in the turbo's so i had a full rebuild done on both turbos, then about a year later, my trust airfilter fell apart and was stuck into the front turbo damaging the turbo wheel. Had the front turbo rebuild again.

Now the front turbo is leaking oil from the housing, there is also a build up of oil in the intake pipe (photo attached), The car still runs fine, turbo boost fine and makes good power and there are no sounds coming from the turbo.

Does anyone have any idea what could be causing this?

One of the suggestion by my mech is that the turbo does not have the correct restrictor installed and therefore the turbo is getting too much oil (however he isn't 100% sure), the rear turbo does have a slight amount of oil on the housing but no where near the amount of the front turbo also the front turbo is leaking enough that it drips oil in my garage but the rear does not.

From what i remember the turbo had the restrictor installed already in the turbo housing in the oil inlet. Is it possible that the restrictor wasn't put back after the turbo was rebuild the second time and if so would this cause the oil leak i am seeing?

Any input or help would be greatful

[dori34]

you can get the oil feed bolts with the restrictors (0.8mm) on ebay from Kando for like $15 and they're easy to replace so it would be a good place to start, if alot of oil still comes through , then you have bigger problems else where.

could be the seals or some excessive blow by coming through. how's your catch can & PVC valve setup?

i ran this on r34 gtr stock turbos and it minimized the oil coming through, however there was still a tiny amount coming through but not enough for it to leak out onto the floor.